Thats why you plan your journey carefully with plenty of stops. Wearing a t shirt under leathers in a hot country often keeps you cool - something i can vouch for whilst riding in Portugal a couple of years back! It was boiling hot, but none of us suffered heat stroke or any other adverse effects caused by over heating. Theres plenty of gear made for wearing in hot weather you can buy - draggin jeans, vented boots and gloves, jackets and trousers with flow-thru mesh that allows for rapid cooling, heck you can even buy a helmet liner - which although it wont stop your head from sweating, it will keep it dry by wicking away moisture. So all that "i dont wear them cos its too hot" is just a shit excuse IMO.
As for the thread being tedious - it might have gone off topic a little (guilty as charged) but its back on track and theres been some good posts - as the old saying goes - if you dont like it.........